Optical signal control method and apparatus, optical transmission node, and optical transmission system

A system, comprising:

• at least two optical transmission nodes, wherein at least one optical transmission node of the at least two optical transmission nodes comprises a wavelength selective switch (WSS) or an optical amplifier, wherein the at least one optical transmission node of the at least two optical transmission nodes further comprises an apparatus, and wherein each apparatus comprises:
• a light source, configured to output a first optical signal;
• an optical switch circuit, wherein a first input of the optical switch circuit is configured to receive the first optical signal, a second input of the optical switch circuit is configured to receive a second optical signal, and an output of the optical switch circuit is configured to output a third optical signal;
• and
• a detection circuit, configured to detect whether a power change of the second optical signal on at least one wavelength channel is greater than a preset power change threshold, wherein the power change of the second optical signal on the at least one wavelength channel being greater than the preset power change threshold indicates a wave drop state or a wave add state, the wave drop state is a state in which the at least one wavelength channel of the second optical signal changes from having a wave to having no wave, and the wave add state is a state in which the at least one wavelength channel of the second optical signal changes from having no wave to having a wave;
• wherein each optical switch circuit is configured to:
• after a corresponding detection circuit detects that the power change of the second optical signal on the at least one wavelength channel is greater than the preset power change threshold, adjust on/off states of at least one wavelength channel of the first optical signal and the at least one wavelength channel of the second optical signal, to obtain an adjusted first optical signal and an adjusted second optical signal, wherein the adjusted first optical signal and the adjusted second optical signal are combined to obtain the third optical signal;
• and
• wherein target wavelength bands corresponding to different optical transmission nodes are different from each other.

A method, comprising:

• detecting whether a power change of a second optical signal on at least one wavelength channel of the second optical signal is greater than a preset power change threshold,
• wherein the power change of the second optical signal on the at least one wavelength channel being greater than the preset power change threshold indicates a wave drop state or a wave add state, the wave drop state is a state in which the at least one wavelength channel of the second optical signal changes from having a wave to having no wave, and the wave add state is a state in which the at least one wavelength channel of the second optical signal changes from having no wave to having a wave, and
• wherein the second optical signal is received by an apparatus from outside of the apparatus;
• and
• adjusting, after it is detected that the power change of the second optical signal on the at least one wavelength channel is greater than the preset power change threshold, on/off states of at least one wavelength channel of a first optical signal and the at least one wavelength channel of the second optical signal, to obtain an adjusted first optical signal and an adjusted second optical signal, wherein the adjusted first optical signal and the adjusted second optical signal are combined to obtain a third optical signal.

A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores executable computer instructions, and the executable computer instructions, when executed, instruct a computer device to:

• detect whether a power change of a second optical signal on at least one wavelength channel is greater than a preset power change threshold,
• wherein the power change of the second optical signal on the at least one wavelength channel being greater than the preset power change threshold indicates a wave drop state or a wave add state, the wave drop state is a state in which the at least one wavelength channel of the second optical signal changes from having a wave to having no wave, and the wave add state is a state in which the at least one wavelength channel of the second optical signal changes from having no wave to having a wave;
• and
• adjust, after it is detected that the power change of the second optical signal on the at least one wavelength channel is greater than the preset power change threshold, on/off states of at least one wavelength channel of a first optical signal and the at least one wavelength channel of the second optical signal, to obtain an adjusted first optical signal and an adjusted second optical signal, wherein the adjusted first optical signal and the adjusted second optical signal are combined to obtain a third optical signal.